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61. It showed that gravitational collapse was not as much of a dead end as it had appeared to be.

62. The more asymmetric the collapse, the larger the gravitational energy release becomes.

63. However, the larger the body the less important become its non-gravitational forces in comparison with its internal gravitational forces.

64. As the star shrank, the gravitational field at the surface would become stronger and the escape velocity would increase.

65. He would be torn apart by the difference between the gravitational force on his head and his feet.

66. Thus, in particular, heavenly bodies moving in a gravitational field are well described by such geodesics.

67. But when, however, the expansion slows down, the gravitational effect begins to assert itself.

68. Stars will remain stable like this for a long time, with heat from the nuclear reactions balancing the gravitational attraction.

69. It is in fact a general feature of colliding electromagnetic plane waves that gravitational waves are always generated by the collision.

70. Stars are initially formed from gas, mostly hydrogen, and contract under their own gravitational attraction.

71. And we do know that for some gravitational reason we've yet to fathom, the absorption effect is nullified below ground-level.

72. Similarly, high electrical charges should also exert a gravitational effect towards neutral matter.

73. By collision and gravitational attraction, the larger planetesimals swept up the smaller pieces and became the planets.

74. These counteract the tendency for the body to contract under its own gravitational pull.

75. The second main source of internal energy is heat from gravitational separation.

76. If there is less than a certain amount, the gravitational force will be insufficient to stop a never-ending expansion.

77. To escape from the Moon's gravitational field, a sample must be accelerated to a velocity above 2.4 kilometres per second.

78. They don't have the energy to hold themselves up any longer-against their own gravitational forces.

79. In 1965 I read about Penrose's theorem that any body undergoing gravitational collapse must eventually form a singularity.

80. This is only true in deep space when the gravitational force can be neglected.

81. Thus, in a sense,(sentencedict.com/gravitational.html) the gravitational field has negative energy.

82. Is there any evidence of gravitational attraction being modified by intervening matter.

83. This describes the collision of plane gravitational waves with step wavefronts.

84. Let us return to our sphere of particles dropping in a gravitational field.

85. But even with a rigid outer Moon gravitational forces would have raised the floor most of the way towards isostatic equilibrium.

86. The answer is that it was borrowed from the gravitational energy of the universe.

87. Both Mercury and Mars have gravitational fields too low to retain an atmosphere.

88. When the astronaut is in a uniform gravitational field he is incapable of determining his motion by any mechanical means.

89. During the passage of gravitational waves it is the structure of space-time itself which oscillates.

90. During the inflationary period the universe borrowed heavily from its gravitational energy to finance the creation of more matter.